Spring pulsation dampener
CA 2202853 A1 · Owner: Whitesell, Richard F. · Inventors: Whitesell, Richard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas or liquid pulsation dampening system is provided which minimizes the size of the vessel required to effectively dampen gas or liquid pulsations while maximizing the dampening effect. The gas or liquid pulsation dampening system comprises a novel spring pulsation dampening valve and a vessel for housing the valve and for containing a gas or liquid. The vessel is equipped with a pulsating gas or liquid inlet and a dampened gas or liquid outlet, and support means for holding the spring pulsation dampening valve in axial alignment with the dampened gas or liquid outlet. The spring pulsation dampening valve comprises first and second ends, a stationary outer sleeve, and a spring loaded gas …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 16, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.